One guy's opinion, of the ideal, with directions given of what you should do.
Imagine that you're dying of thirst and starvation, just on the edge of death. You're only chance of survival is to get as much semen out of the guy in front of you into you through your mouth. The clock is ticking. You need to suck as hard as possible to get it out before the alarm buzzes and you die. The harder you suck, the more you manipulate his penis and balls, and the longer you suck--alarm willing, the more you can get out, hence live longer.
I read in a women's magazine eons ago one of those "How to give a great BJ" articles. 2 things it got WAY WRONG were: ”It isn't the sucking that matters as much as using your hands to stimulate.” False. Sucking is paramount. Second, “he doesn't care AND CAN’T TELL if he comes in your mouth, so don't worry about doing that.” False. Can't tell? Who were those people? Not men.
Suck as hard as possible. Forever. Vary the intensity and length overall, but stick with a pattern for a while. Some super-intense very fast, shallow rapid-fire in-out sucking works well for a while. Another pattern: Suck as hard as possible, with him in as far as possible, and don't let go; no stopping and sucking again for as long as possible, continuous. Give the boys mucho attention, including taking them in your mouth and sucking and running your tongue all over them. Hold them firmly. Lick up and down everywhere. Hold your hands tightly when grasping (goes for HJ, too). Give attention to the frenulum (sp?) on the underside. Trace around the side and bottom side of the ridge on the head. Take it in your mouth as far as possible for a long duration overall.
Deepthroat.
Use your hands on my cock and push up under my balls at various times. Rubbing upward down there, jacking me--if it's not all the way inside you, and sucking me hard while I'm in your mouth when I'm coming will make me propose marriage to you. (Never had a prostate massage and I’m curious, so I can’t comment on that).
Coming in mouth and swallowing guide.
To put it this way: I don't care if I come in a woman's mouth or if she swallows as long as she: Doesn't stop sucking hard until every last tiny, tiny drop is out and every last tiny, tiny throb has pulsed its way all the out through my cock and balls, i.e. she sucks me dry. If you can do that without 1. Me coming in your mouth and 2. Swallowing, more power to you. I’m sure you can't do the former, and doubt you can do the latter.
The sucking throughout the entirety of the orgasm is the dominant issue. Think: If what you do to get him to the tipping-point of orgasm gives him pleasure, it is only multiplied if it is continued on the downward slope from that tipping point. That's why coming in the mouth and swallowing matter, idirectly, physically (psychologically is another matter: continuing to do what was done to make coming happen in the first place provides tremendous pleasure.
Suck me dry as the default option unless I say otherwise.
Simply put, ALWAYS let him come in your mouth if he wants; do it as your default unless he says otherwise. Swallow as your default unless he says otherwise. Be as an intense as possible--overall. Suck harder than you think is possible. Think of the whole experience as running to get the life-saving liquid you need against a close but unknown deadline, and act accordingly.
If you want to be the best, that does it for me.